[1316] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: testSurfaceAreaCube.cc,v 1.1 2006/10/20 14:38:52 gcosmo Exp $ |
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[1347] | 28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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[1316] | 29 | // |
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| 30 | // -------------------------------------------------------------------- |
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| 31 | // Adapted by Hans Dierckx to test surface Area |
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| 32 | |
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| 33 | // The MC method is applied to different solids that have a total surface |
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| 34 | // area of 100 units. The method is repeated 20 times, after which the |
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| 35 | // average and standard deviation is calculated. This generates the graphs |
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| 36 | // in the report, if one would set the right values for N and gamma in |
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| 37 | // G4VSolid.cc. |
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| 38 | |
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| 39 | // Ensure asserts are compiled in |
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| 40 | |
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| 41 | #include <assert.h> |
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| 42 | #include <cmath> |
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| 43 | #include <ctime> |
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| 44 | |
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| 45 | #include "globals.hh" |
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| 46 | #include "geomdefs.hh" |
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| 47 | |
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| 48 | #include "G4ThreeVector.hh" |
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| 49 | |
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| 50 | #include "G4Box.hh" |
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| 51 | #include "G4Tubs.hh" |
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| 52 | #include "G4Trap.hh" |
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| 53 | #include "G4Trd.hh" |
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| 54 | #include "G4Para.hh" |
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| 55 | #include "G4Sphere.hh" |
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| 56 | #include "G4Orb.hh" |
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| 57 | #include "G4Torus.hh" |
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| 58 | #include "G4Cons.hh" |
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| 59 | #include "G4BooleanSolid.hh" |
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| 60 | #include "G4IntersectionSolid.hh" |
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| 61 | |
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| 62 | #include "G4RotationMatrix.hh" |
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| 63 | #include "G4AffineTransform.hh" |
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| 64 | #include "G4VoxelLimits.hh" |
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| 65 | |
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| 66 | |
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| 67 | #include "Randomize.hh" |
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| 68 | |
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| 69 | /* |
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| 70 | G4bool testG4Surf() |
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| 71 | { |
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| 72 | G4double surf, MCsurf; |
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| 73 | |
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| 74 | G4cout << "\n\nCalculating Box:" << G4endl; |
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| 75 | G4Box box("Test Box",1,0.5,3); |
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| 76 | // fDx fDy fDz |
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| 77 | surf = box.GetSurfaceArea(); |
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| 78 | G4cout <<"Surface = " << surf << G4endl; |
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| 79 | G4IntersectionSolid box2("Box 2", &box, &w); |
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| 80 | MCsurf= box2.GetSurfaceArea(); |
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| 81 | G4cout <<"MC result = " << MCsurf << G4endl; |
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| 82 | G4cout << "deviation =" << (surf-MCsurf)/surf*100 << " %"<< G4endl; |
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| 83 | G4cout <<"*******************" << G4endl; |
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| 84 | |
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| 85 | return true; |
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| 86 | } |
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| 87 | */ |
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| 88 | |
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| 89 | int main() |
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| 90 | { |
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| 91 | |
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| 92 | // initialise random generator: |
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| 93 | CLHEP::RanluxEngine defaultEngine(1234567,4); |
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| 94 | CLHEP::HepRandom::setTheEngine(&defaultEngine); |
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| 95 | G4int seed = time(NULL); |
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| 96 | CLHEP::HepRandom::setTheSeed(seed); |
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| 97 | |
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| 98 | |
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| 99 | // testobj = Sphere |
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| 100 | G4Box w("Bigger Box",5,5,5); |
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| 101 | // G4double R = std::sqrt(25./pi); |
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| 102 | //G4Orb sol("Orb",R); |
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| 103 | |
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| 104 | // G4double R= std::sqrt(100./16./pi); |
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| 105 | // G4Tubs sol("Test Cyl",0.5*R,1.5*R,1.5*R,0,twopi); |
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| 106 | |
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| 107 | G4double R = std::sqrt(2.5); |
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| 108 | G4Trd sol("Test Trd", R,2*R, 2*R,R,std::sqrt(3.)*0.5*R); |
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| 109 | //Dx1,Dx2,Dy1,Dy2,Dz |
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| 110 | G4double exsurf = sol.GetSurfaceArea(); |
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| 111 | G4cout << "Exact result:"<< exsurf << G4endl; |
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| 112 | G4IntersectionSolid sol2("Box 2", &sol, &w); |
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| 113 | |
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| 114 | for(G4int N = 100000; N<=10000001; N *=10){ |
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| 115 | G4double scale; |
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| 116 | for(scale=2; scale>=0.00096; scale /=2){ |
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| 117 | G4double sum = 0; |
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| 118 | G4double std = 0; |
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| 119 | G4double s; |
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| 120 | G4double rep = 20; |
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| 121 | for(G4int p=0; p<rep;p++) |
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| 122 | { |
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| 123 | sol2.SetAreaStatistics(N); // Inside loop to force area |
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| 124 | sol2.SetAreaAccuracy(scale*R); // recomputation for calculating |
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| 125 | s = sol2.GetSurfaceArea(); // average result ... |
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| 126 | sum =sum+s; |
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| 127 | std =std+(exsurf-s)*(exsurf-s); |
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| 128 | } |
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| 129 | G4double avsurf = sum/rep; |
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| 130 | std = std::sqrt(std/(rep-1)); |
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| 131 | G4cout << "MC result: N= "<< N << " Average = "<< avsurf |
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| 132 | << " std= " << std << " scale = "<< scale << G4endl; |
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| 133 | } |
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| 134 | } |
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| 135 | return 0; |
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| 136 | } |
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